Concrete construction.



J. GILLIGAN.

CONCRETE CONSTRUCTION,

APPLICATION FILED JAN.27,1012.

1,055, 1 62, Patented Mar. 4, 1913.

ii 'l I 9 50 sections.

i In the drawmg: Figure 1 is an end eleva- UNITE sTAT s TrENT orrrcn.

JOHN GILLIGAN, F LINCOLN. NEBRASKA.

CONCRETE CONSTRUCTION.

Specification of Letters Patent.

Patented Mar. 4, 1913.

Application filed January 27. 1912. Serial No. 673.863.

to a series of concrete sections arranged end to end and joined orconnected through the medium of metal bars embedded therein and havingtheir presented terminals inten engaged the said bars constituting notonly the requisite reinforcements for the sec tions, but also the meanswhereby the sections are united to form a complete structure. Thedifiiculty in etlecting the connection of sections in a positive mannerhas been due in a large measure to the inability to take up the movementor play between the ends of the bars when the latter are looselycoupled, or for obtaining a close abutting relationship between thecontiguous ends of ad'accnt sections and consequently it has beenusually necessary to employ an additional connecting means in the natureof a grout or joint of coirerete interposed between the section ends.thereby increasing the time and expense of joining the section ends.

The present invention is intended to completely obviate the defectsheretofore encountered in connecting concrete sections by using metalbars which are particularly constructed to insure a tight jointurcbetween the same and the ends of the sections to which they are appliedby a simple operation, and when employed in connection with pipesections to provide a smooth surface and and secand flow line on theinterior of the pipe thus minimize the cost of manufacture produce asuperior association of the tions.

It will be understood that the invention may be applied to either pipesections or I blocks, the accompanying drawing illustratjing onepractical application of the inven- 1 jtion and showing the same appliedto pipe tion of a pipe section embodying the features of the invention.Fig. 2 is a side elevation of the same showing parts in dotted lines.

Fig. 3 is a side elevation partially broken away and in section showingpipe sections or members associated in terminal relation andillustrating the mode of assembling the bars or rods and securing thelatter and the several pl sections or members. Fig. 4 is a detail viewof one of the bars or rods. Fig. 5 is a. detail view illustrating thetirst step in securing or connecting the contiguous ends of the bars orrods. Fig. (3 is a detail view showing the connection of the bars orrods completed.

The numeral 5 designatcsthe pipe section or concrete member having atone end upper and lower pairs of angular recesses 6 and 7, the upperpair of recesses 6 opening out. through the end of the section and alsothrough the outer surface of the latter and.

the lower pair of recesses 7 opening outwardly through the end andthrough the inner-surface of the pipe or section. Pairs of bars or rods8 are'embedded in the upper and lower portions of the section or pipe 5,the said pairs of bars being arranged parallel and the lower pair invertical alinement with the upper pair, the said pairs of barsreinforcing the concrete construction or the section or pipe 5 at pointsabove and below the center of the latter or on opposite sides of thecenter of the same. Each bar or rod is formed at one end with a loop oreye 9 and at the opposite end with an upturned or angular-1y directedterminal 10, the bars or rods being so disposed in the section or pipe 5that all of the loops 9 will be equally projected from onefend, asclearly,

shown by Figs. 2 and 3, and the upwardly inclined terminals 10 exposedwlthin the upper and lower pairs of recesses 6 and 7 to enter' or engagethe loops or eyes 9 projecting from the end of a contiguous section orpipe 5. y

In assembling the sections or pipe members 5 the one section is slightlyelevated with relation to the end of the adjacent section so that theprojected loops 9 at the end of the raised section are over the angulartermina 10, and the latter are then forced or glided through the eyes 9when the raised section is gradually lowered, and when the sections arethus positioned they will be inllongitudimll alinement and the angularteuininals 10 are bent over into hook form, as shown by Fig. (3, thesaid ttwminals being readily accessible through the medium of therecesses ti and 7. the angular terminals 10 have been bent over in hookform as just explained and When no

